Low-Cost RF Up/Downconverter with LNA and PA Driver

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The MAX2411A performs the RF front-end transmit/receive function in time-division-duplex (TDD) communication systems. It operates over a wide frequency range and is optimized for RF frequencies around 1.9GHz. Applications include most popular cordless and PCS standards. The MAX2411A includes a low-noise amplifier (LNA), a downconverter mixer, a local-oscillator buffer, an upconverter mixer, and a variable-gain power-amplifier (PA) driver in a low-cost, plastic surface-mount package. The MAX2411A's unique bidirectional, differential IF port reduces cost and component count by allowing the transmit and receive paths to share the same IF filter.

The LNA has a 2.4dB typical noise figure and a -10dBm input third-order intercept point (IP3). The downconverter mixer has a low 9.2dB noise figure and 4dBm input IP3. Image and local-oscillator filtering are implemented off-chip for maximum flexibility. The PA driver amplifier has 15dB of gain, which can be reduced over a 35dB range. Power consumption is only 60mW in receive mode and 90mW in transmit mode and drops to less than 3µW in shutdown mode.

For applications requiring separate, single-ended IF input and output ports, refer to the MAX2410 data sheet. For applications requiring only a receive function, Maxim offers a low-cost downconverter with LNA (see the MAX2406 data sheet).
MAX2411A: Typical Operating Circuit MAX2411A: Typical Operating Circuit Enlarge+

Key Features

  • Low-Cost Silicon Bipolar Design
  • Integrated Upconvert/Downconvert Function
  • Operates from a Single +2.7V to +5.5V Supply
  • 3.2dB Combined Receiver Noise Figure:
    • 2.4dB (LNA)
    • 9.2dB(mixer)
  • Flexible Power-Amplifier Driver:
    • 18dBm Output Third-Order Intercept (OIP3)
    • 35dB Gain-Control Range
  • LO Buffer for Low LO Drive Level
  • Low Power Consumption:
    • 60mW Receive
    • 90mW Full-Power Transmit
  • 0.3µW Shutdown Mode
  • Flexible Power-Down Modes Compatible with MAX2510/MAX2511 IF Transceivers


  • DCS1800 or PCS1900 Single-Mode Phones
  • DECT
  • Iridium Handsets
  • ISM-Band Transceiver
  • PWT1900

See parametric specs for RF Transceivers > 1GHz (11)

Part NumberDuplex MethodFrequency Range
InputsOutputsTx OIP3 Power
Rx Noise Figure
MAX2411A TDD800 to 24001 Rx1 Tx183.2

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX2411AEVKIT: Evaluation Kit for the MAX2411A
Request Reliability Report for: MAX2411A 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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